EQUIP Inter-Operator Interfaces for End-to-End IP QoS

1Tequila WS, Amsterdam, 25-26 January 2001

Inter-Operator Interfaces for End-to-End IP QoS

EQUIPInter-Operator Interfaces for End-to-End IP QoS

István Cselényi, Niklas Borg ~ Telia Research AB, SwedenPéter Haraszti ~ eircom, Ireland

Hamid Gharib ~ British Telecom (BTexaCT), UK Petra Schmid ~ Telekom Austria, Austria

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Tequila WS, Amsterdam, 25-26 January 2001

EQUIP - Eurescom P1008Participants• BT, eircom, Telefónica, Telekom Austria, TeliaTiming• February 2000 - March 2001Scope• technical and business models• metrics and measurements• interfaces

3



Project Objectives• To produce specifications of the technical and

business models, processes and interfaces needed to support automated inter-domain IP QoS management

• To capture requirements and possibilities for service performance and traffic measurements

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Project Results1. State of the art study

~ project report, Q2 ‘00

2. Management scenarios and requirements ~ project report, Q3 ‘00

3. Measurement metrics and methodologies ~ technical information, Q4 ‘00

4. Interface and process specifications ~ technical specification, Q1 ‘01

Just an appetiser...

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Background• Interconnected IP network operators trading

managed IP QoS, end-to-end• Bi-lateral Service Level Agreements (SLA)• QoS implemented in each operator’s domain

– IETF IntServ, DiffServ, MPLS or combination(s)• IP QoS scenarios

– basic IP QoS cross-connection, – VPN and – VoIP

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Roles and InterfacesTrading Roles

– seller– buyer

Responsibilities– IP Network Domain– Service Provider– Service Customer– Service Customer’s

ClientInteraction

– Logical relationship between roles– Physical interfaces, protocols

Trade the components of IP QoS services just as in e-commerce

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Service Customer

Serv

ice

Cus

tom

er C

lient

BB/OSS

Service Provider

IPND A

BB/OSS

IPND T

BB/OSS

IPND Z

Serv

ice

Cus

tom

er

Logical interface

Multi-Operator Trading Model

Service Customer ClientIP Network Domain

Service Provider

Physicalinterface

Service Customer

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Management Interconnect Models (1)

Access (ingress) Access (egress)TransitServicecustomer

Business, Service& Network

ManagementFunctions


ManagementFunctions


ManagementFunctions

SLASLA

Cascade

Servicecustomer

client

Only provider – provider SLAs are shown.

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Servicecustomer

client


ManagementFunctions


ManagementFunctions


ManagementFunctions

SLASLA

Star


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Servicecustomer

client

Hub

NetworkManagement

FunctionsNetwork

ManagementFunctions

NetworkManagement

Functions

SLASLASLA

‘I-operator’Customer

servicemanagement

functions


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Interface Points (1)• Business perspective

business relationship between seller/buyer– service management

• Network perspectivephysical interfaces between systems

– configuration– performance management

• Plane-wise– control / management / user planes

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IPND T

BB/OSSBB/OSS

ManagementPlane

BB/OSS

Access (ingress)

IPND A

Access (egress)Transit

Router Network Ctrl. IF

Protocol transfer

•IP Packet forwarding

•Business Management•Service Management•Network Management•Network Element- Management B B

S

S

S

S

S

S

S



Service Provider

•Routing•Signaling•Shaping•Marking•Policing•CAC•Metering

ControlPlane

UserPlane IPND T

Serv

ice

cust

omer

Serv

ice

cust

omer

clie

nt

B B

Interface Points (2)B

S B

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Service Provision Processes

• identification• advertisement• (re)negotiation• activation/configuration• maintenance/monitoring/reporting• deactivation

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Buyer/(Customer)

(B)

Seller/(Provider)

(S)

Traffic Conditioning SpecificationService Description

Traffic Forecast

Basic Trading Model

1. Service Description (SD)• Service Name,• Service Performance Parameters (edge- to-

edge delay, jitter, loss),• Pipe | Funnel | Hose info propagation model,• Provisioning (static, by RSVP, by BB, by

both),• Service Code Mark(s) (DSCP(s)),• Action On Non-Conforming Traffic (drop,

shape, remark)

2. Traffic Conditioning Specification (TCS)• SLS Reference• SD Reference,• Traffic Descriptor (source/ dest.)• Traffic Profile (rate, burst size)• Scope (ingress, egress)

3. Traffic Forecast (TF)• TCS Reference• Projected Increase/ Decrease• Time

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Information Propagation Models

Pipe

Funnel

Hose

Serv

ice

cust

omer

Ser

vice

cu

stom

ercl

ient

(*, Dest) (*, Dest)

Access (egress)Access (ingress) TransitSe

rvic

ecu

stom

er

Ser

vice

cu

stom

ercl

ient

(Src, Dest) (Src, Dest)

Serv

ice

cust

omer

Ser

vice

cu

stom

ercl

ient

(*,*) (*,*)

Just a component of the SLA – not a management interconnect model!

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Trading Example ~ IP QoS Cross-Connection ~• Similar to a BE transit service, but with defined QoS• End-to-end QoS• Service Customer can be:

• DiffServ and/or IntServ aware • neither DiffServ nor IntServ aware

IntServIntServ DiffServ

BR

CR

CRERER

CR

CRBR BR

CR

CR

BR

Serv

ice

cust

omer

Ser

vice

cu

stom

ercl

ient

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Service Performance Measurement

• Scenarios• Measurement Points• Metrics and Events• Measurement Methodologies• Reporting

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Serv

ice

Cus

tom

er C

lient

Business Perspective

BB/OSSIPND A

SellerService Provider

IPND A

BB/OSSIPND T

IPND T

BB/OSSIPND Z

IPND Z

Buy

erSe

rvic

e C

usto

mer

SLA

End-to-End Scenario (1)

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IPND TRouter

Network

IPND ZRouter

Network

IPND ARouter

Network

1

End-to-end Service Performance

Network Perspective

Serv

ice

Cus

tom

er

Serv

ice

Cus

tom

er C

lient

Traffic Profile

2 3 4 5 6

End-to-End Scenario (2)

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Business Perspective

SellerService

Provider T

BuyerService

Provider A

SD

TCS

TF

ServiceProvider Z

Serv

ice

Cus

tom

er C

lient

BB/OSSIPND A

IPND A

BB/OSSIPND T

IPND T

BB/OSSIPND Z

IPND Z

Serv

ice

Cus

tom

er

Transit Scenario (1)

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IPND TRouter

Network

IPND ZRouter

Network

IPND ARouter

Network

1

Transit Service Performance

Network Perspective

Serv

ice

Cus

tom

er

Serv

ice

Cus

tom

er C

lient

Traffic Profile

2 3 4 5 6

Transit Scenario (2)

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Access Network

IPND A

Serv

ice

Cus

tom

er (A

-end

)

IPND ABB / OSS

CPE LADP LES CACBSS ER BR

CR

CR

MP1 MP2 MP3 MP4 MP5 MP6

MP10

MP7

MP8

MP9

ER - edge router LES - local exchange switch CPE - customer premises equipmentBR - border router MP* - Measurement Point CAC - connection admission controlCR - core router BB - Bandwidth Broker BSS - broadband service selection router

OSS - Operation Support System LADP - local access distribution point

Measurement Points

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Provider – Service Performance Metrics• availability + throughput• delay + jitter• loss

Metrics and Events

Customer – Traffic Profile Metrics• peak rate• maximum burst size• token bucket parameters

IPND TRouter

Network

IPND ZRouter

Network

IPND ARouter

Network

1

End-to-end Service Performance

Serv

ice

Cus

tom

er (A

-end

)

Serv

ice

Cus

tom

er C

lient

(Z-e

nd)

Traffic Profile

23 4 5 6

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Summary• Goal

– automated SLS management system• Delivered results

– State of the art study – Management scenarios and requirements– Measurement metrics and methodologies

• Current work– Specify an inter-domain QoS management interface

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Future WorkEURESCOM P1103• The goal is to validate, extend and enhance the Inter-

operator IP QoS provisioning framework of P1008 from both technical and business perspectives

• Two case studies– compatibility with PSTN telephony services (e.g., IN service,

Value Added services, control protocol aspects)– UMTS – IP QoS interoperability

• Identifying accounting and pricing requirements and cost principles for this service (e.g., Support QoS rebates, etc);

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InformationProject members here at the WS:István Cselényi ([email protected])

Niklas Borg ([email protected])Telia Research AB, Sweden

Péter Haraszti ([email protected])eircom, Ireland

Hamid Gharib ([email protected])British Telecom (BTexaCT), UK

Petra Schmid ([email protected])Telekom Austria, Austria

Project homepage: http://www.eurescom.de/public/projects/P1000-series/p1008/P1008.htm

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ThanksTelekom Austria

• Petra Schmid

• Armin Sumesgutner

British Telecom, UK

• Hamid Gharib

• Chris Hatch

• Dave Milham

Telefónica, Spain

• Vicente Cruz

• Sonia Escudero

Telia Research, Sweden

• Anders Bergsten

• Niklas Borg

• István Cselényi

eircom, Ireland

• Ludovic Fiard

• Péter Haraszti

• Andrew Kelleher

• Denis McCarthy

• Garett Thompson

Documents

EQUIP Inter-Operator Interfaces for End-to-End IP QoS